» columbo

In AOL TV's continuing countdown of the best TV shows of each decade, we're back to break down the 1970s, a decade when the cop dramas were less gritty, the families were close-knit and the sitcoms were sprinkled with serious social commentary.

Our list of the best shows of the '70s features many of the best shows of all time (here's looking at you, 'Mary Tyler Moore Show,' 'M*A*S*H' and 'Taxi'). Take a gander and let us know if you agree.

It's not easy winnowing more than 50 years of small-screen gems into a list of 50.

But AOL TV's picks of the top TV dramas include the most brilliant doctors and lawyers, the angst-iest teens, sci-fi series that transcend their genre molds, family dramas that both warm and break your heart, terrorist- and mobster-fighting heroes ... and a show that combined the best of family and gangster drama into one unforgettable series.

Click through to see all 50 of the best TV dramas of all time.

Island-dwelling heroes, martini-swilling Ivy Leaguers and autobiography-penning sitcom actors ... we're talking, of course, about TV land's most beloved canine cohorts.

How much do you know about the most memorable prime-time pooches?

Take our quiz and find out! Be warned: it's "ruff" stuff.

On which show did the phrase "Yada, yada, yada" first appear?

'The Office''s Michael Scott (Steve Carell) single-handedly brought back "That's what she said" jokes and the world is forever in his debt.

Some shows are so jam-packed with quotable lines that it's hard to keep track of who said what.

It's time to prove your knowledge of the origins of television's greatest catchphrases by taking our quiz.